Then if it doesn’t fit there, you may be able to loosen the lid up enough to get it to fit tightly by following the methods we have already described. If the lid is too loose, it may simply need to go on a larger bowl. In this situation, Tupperware plastic, and any plastic, can be very finicky because it is not just the shape or the fit you are going for, it is the tight seal that has to be done as well. If one part does not shrink, it will not provide the seal you are looking for. The problem with shrinking plastic, especially for something so vital as keeping food fresh, is that the method has to be done evenly. No one is talking about shrinking a lid so there is no way to report an alternative solution other than contacting the company.
Here is the link to their website page that provides the instructions for how to replace your lid. In this case, it would be best to contact Tupperware itself and see if the lid qualifies for their limited lifetime warranty. You can try the methods we already listed above to see if those options help tighten the lid up but in most cases, it may not work. This is going to be a tricky maneuver as it is hard to shrink plastic to where it will provide a perfect fit and keep the food inside fresh. Also, microwaves heat from the inside out so you have to be careful not to ruin the integrity of the lid when using that appliance. There is always a risk of melting the plastic or deforming it further when left under extreme heat for too long. The key will be the length of time in all three options. If you do not have a dishwasher you can use your microwave and a boiling pot of water to warm the lid up and then place it back on its bowl to cool. This way the lid will reshape itself and still be able to grab the bowl lip when it is cool. Then while warm simply place the lid back on the bowl it came from and let the lid cool. One solution is to place the lid in the dishwasher for one cycle. It happens to just about everyone so you are not alone. This is a common problem with older Tupperware lids. Left underweight for a long period is not going to be a problem. The key is to be careful and not forget about the lid being in such heat. Try a minute at a time and then place a heavy flat object on top of the lid to bring it back to its original size.Īnother solution would be to place the lid in some boiling water, again not for a very long time, and then either let the lid lie flat without any weight or add a little weight to encourage the plastic to return to its original shape. You certainly do not want the lid in the oven for too long or you just damage it further.
The heat level is going to be done by trial and error as different thicknesses of plastic will respond to different levels of heat.Īs well as the time frame. One solution is to put the lid in your microwave and turn it on. This is a one-time fighting fire with fire will work. Heat is what warped the plastic lid in the first place and heat is what is going to be needed to fix it. As we just noted, heat is going to be the key element needed in order to fix a warp.